EP1970584A2 - Linear roller bearing - Google Patents

Abstract

The linear roller bearing has a base element (10), which is formed as a hollow cylinder. The linear roller bearing is formed for a pre-determined main load direction, perpendicular to a hollow cylinder cover at a peripheral position. The base element is formed at another peripheral position for an axial or anti-torsion fastening or a lubrication at its installation area.

Description

The invention relates to a linear roller bearing.

For example, from the DE 40 15 124 A1 is a ball bearing for longitudinal movements known that has a surrounding with its inner surface a shaft cage. The cage has axial guideways for loaded balls and axial return tracks for unloaded balls and a cover at each of its two ends. Each cover has deflecting tracks, each of which connects a guideway with a return path end. At the two axial ends seals are still used in the cage.

An object of the invention is to provide an improved linear roller bearing.

The object is solved by the subject matter of claim 1. Advantageous embodiments are described in the subclaims.

• Ein hohlzylinderartig ausgebildetes Grundelement,
• das Lincarwälzlager ist für eine vorgebbare, an einer ersten Umfangsstelle im wesentlichen senkrecht zum Hohlzylindermantel stehende Hauptlastrichtung ausgebildet,
• das Grundelement ist an einer zweiten Umfangsstelle für ein axial- und/oder verdrchsicheres Befestigen mit seiner Einbauumgebung und/oder ein Nachschmieren ausgebildet, und
• das Linearwälzlager weist an wenigstens einer seiner Stirnseiten eine erste Markierung, anzeigend die erste Umfangsstelle, und eine zweite Markierung, anzeigend die zweite Umfangsstelle, auf.

According to claim 1, a linear rolling bearing includes the following features:

• A hollow cylinder-like basic element,
• the Lincar roller bearing is designed for a predefinable, at a first circumferential location substantially perpendicular to the hollow cylinder shell main load direction,
• the base member is formed at a second circumferential location for axially and / or non-rotatable mounting with its installation environment and / or relubricating, and
• the linear rolling bearing has on at least one of its end faces a first mark indicating the first circumferential location and a second mark indicating the second circumferential location.

Due to the two markings, the angular position-correct mounting of the linear ball bearing is considerably facilitated, both with respect to the main load direction and with respect to the circumferential location, for a non-rotatable fastening and / or relubrication.

Figur 1

in perspektivischer Ansicht ein teilzusammengebautes, in Umfangsrichtung in sich geschlossenes, hohlzylinderartiges Linearkugellager,

Figur 2

in perspektivischer Ansicht ein Umlenkelement des Linearkugellagers der Figur 1,

Figur 3

in perspektivischer Ansicht einen Schmierstoffspeicher des Linearkugellagers der Figur 1,

Figur 4

in perspektivischer Ansicht ein Deckelement für das Lincarkugellager der Figur 1,

Figur 5

einen ausschnittsweisen Längsschnitt durch eine zwischen einem Umlenk- und einem Deckelement angeordnete Dichtung,

Figur 6

in perspektivischer Ansicht das zusammengebaute Linearkugellager der Figur 1,

Figuren 7 und 8

in der Figur 6 mit A und B bezeichnete Ausschnittsvergrößerungen der Figur 6,

Figur 9

in perspektivischer Ansicht ein in Umfangsrichtung unterbrochenes Linearkugellager,

Figur 10

eine Frontansicht einer Dichtung für das Linearkugellager der Figur 9,

Figur 11

einen Längsschnitt durch die Dichtung der Figur 10 und

Figur 12

eine in der Figur 11 mit D bezeichnete Ausschnitlswergrößerung der Figur 11.

Further advantages, features and details of the invention will become apparent from the Ausfübrungsbeispielen of the invention described below with reference to FIGS. Showing:

FIG. 1

in a perspective view a partially assembled, circumferentially self-contained, hollow cylinder-like linear ball bearing,

FIG. 2

in perspective view a deflection of the linear ball bearing of FIG. 1 .

FIG. 3

in a perspective view of a lubricant reservoir of the linear ball bearing of FIG. 1 .

FIG. 4

in perspective view a cover element for the Lincarkugellager the FIG. 1 .

FIG. 5

a fragmentary longitudinal section through a arranged between a deflecting and a cover element seal,

FIG. 6

in a perspective view of the assembled linear ball bearing FIG. 1 .

FIGS. 7 and 8

in the FIG. 6 with A and B designated detail enlargements of FIG. 6 .

FIG. 9

in perspective view a circumferentially interrupted linear ball bearing,

FIG. 10

a front view of a seal for the linear ball bearing of FIG. 9 .

FIG. 11

a longitudinal section through the seal of FIG. 10 and

FIG. 12

one in the FIG. 11 with D designated Ausschnitlswergrößerung the FIG. 11 ,

The FIG. 1 shows as an embodiment of the invention in a perspective view elements 10, 20 and 30 of a linear ball bearing with a plurality, provided for endless circulation ball rows. Through the hollow of the in the FIG. 1 illustrated linear ball bearing is an axis or shaft provided for passing, so that via the load-bearing balls and raceway inserts 60, the linear ball bearing with respect to the axis or shaft is at least longitudinally displaceable. Merely for reasons of clarity, the balls as well as the axis or shaft are not shown.

In this case, the linear ball bearing comprises a hollow cylinder-like base member 10 with substantially rectilinear guides 14 for the loaded and unloaded balls and receiving openings for track inserts 60, so that the loaded balls on the one hand on the axle or shaft and on the other hand on the raceway inserts 60 unroll. It can be like in FIG. 1 shown, the raceway inserts 60 are formed outwardly according to a longitudinal strip of a cylinder jacket, wherein in other embodiments, also raceway elements can be used, the outer, central region has a radially outward bulge, which then with the linear ball bearing misalignment up to a certain Degree can be compensated. However, advantageously one and the same elements 10, 20 and 30 can be used both for the angle-adjustable and for a comparable, non-angle-adjustable design.

At both axial ends of the base member 10 is formed similar. In the following, the condition in the region of the axial ends will be explained exclusively with reference to the left axial end, which of course also applies to the other axial end. In this case, said axial end of the base member 10 is formed in the region of the outer shell of the base member 10 with such an axial projection 11 that in the cavity of the projection 11, a deflecting element 20 and a cover member 30 are snapped. In the FIG. 1 the deflecting element 20 is shown in the snapped-in state. The FIG. 2 also shows a perspective view of the deflecting element 20 in isolation.

The deflecting element 20 comprises semicircular guides 24 by means of which the balls are deflected between the rectilinear guides 14 in the base element 10 for the loaded and unloaded balls. The projection 11 is formed for said snapping with the projection 11 radially penetrating openings 12, in which corresponding radial projections 22 of the deflecting element 20 are provided for snapping. The openings 12 and the projections 22 are arranged and adapted to one another in such a way that the base element 10 and the deflection element 20 can be connected to one another only in a predeterminable compression position, so that the guides 24 in the deflection element 20 fit precisely to that of the base element 10. In the Assembly, while the deflection element 10 is pressed axially from the left into the projection 11 and then snaps accordingly.

Furthermore, the deflecting element 20 is formed on the outwardly directed end side in an inner edge region with sector-like axial projections 26, so that between the sector-like extensions 26 and this simultaneously enclosing, a ring-like lubricant reservoir 40 can be used. The exact fit between the sector-like extensions 26 of the deflecting element 20, the lubricant reservoir 40 between the scktorartigen extensions 26 radially inwardly toward the axis or shaft projecting projections 46 which serve to lubricate the axle or shaft exclusively in those areas where the balls for Rolling are provided. It is thus clear that the sector-like extensions 26 are also placed on the deflection element 20 in such a way that the extensions 46 of the lubricant reservoir 40 projecting radially inwards satisfy the aforementioned condition. Furthermore, the sector-like extensions 26 on the deflecting element 20 and the radial projections 46 on the lubricant reservoir 40 are arranged and adapted to one another in such a way that a relative to the mutual rotational position correct assembly is enforced so to speak.

In the FIG. 1 the lubricant reservoir 40 is shown inserted into the deflecting element 20 state, whereas he in FIG. 3 again shown in isolation in perspective. In this case, the lubricant reservoir 40 from a porous material, such as foam, be formed and serve as an oil lubricant, with which the foam is impregnated. The fact that only areas are lubricated, on which the balls roll on the axis or shaft, is advantageously increased dic service life of the once filled with lubricant lubricant reservoir 40, up to a lifetime lubrication. In other embodiments, however, an embodiment in which oil is held in a polymeric matrix, which is also known under the keyword "solid oil", used and / or relubricated.

This is completed in the FIG. 1 shown linear ball bearings finally by the fact that from the left side still in the FIG. 4 shown cover member 30 is snapped into the projection 11 of the base member 10 so that the linear ball bearing accordingly FIG. 6 results. In this case, the cover member 30 is snapped into the same openings 12 of the projection 11, including the cover member 30 has correspondingly formed radial extensions 32. In this case, of course, the radial extensions 32 on the cover element 30 and the openings 12 of the projection 11 are arranged and adapted to one another in such a way that with respect to the mutual rotational position correct assembly is enforced so to speak.

In the FIG. 6 Although not shown, but can between the deflecting element 20 and the cover member 30 according to FIG. 5 Also, a seal 50 are arranged, which serves to seal the linear ball bearing relative to the axis or shaft. It shows the FIG. 5 a section of a longitudinal section of the arranged between the deflecting element 20 and the cover member 30 seal 50. The seal 50 is formed as a self-contained ring. The seal 50 is of uniform material and made in one piece from an elastomeric material. The longitudinal section of the seal 50 in this case has a rectangular base region 52, at which radially outwardly an annular circumferential bead 54 connects and connect to the inner shell an obliquely outwardly and an obliquely inwardly projecting sealing lip 56 and 57.

Furthermore, the sector-like axial extensions 26 of the deflecting element 20 are provided with axially projecting lugs 27, which are provided for engagement between said rectangular base portion 52 and the obliquely inwardly facing sealing lip 57. Likewise, the cover element 30 is formed on the inner shell side with an annular circumferential, axially inwardly projecting nose 37, which is provided for engagement between the rectangular base portion 52 of the seal 50 and the obliquely outwardly projecting sealing lip 56 of the seal 50 for engagement. This will be a particular advantage said gasket 50 safely guided, held and centered. Due to the two sealing lips 56 and 57 and the outer geometry of the base element 10, a good sealing effect is achieved even with alignment skids between the linear ball bearing and the axle or shaft, thus even with angular errors, so that dirt is kept away from the interior of the linear ball bearing and an existing lubricant is held inside the linear ball bearing.

Like that FIGS. 1 and 6 can be removed, the base member 10 of the linear ball bearing is further formed in a Mittenbcreich with a recess 16 which serves to axially and against rotation secured against an installation environment and can be used simultaneously as a grease nipple for relubrication of the linear ball bearing. At the same time, this peripheral point for the torsion-proof fastening is characterized on the face side both on the front side of the projection 11 of the base element 10 and on the cover element 30 by corresponding markings 18 and 38, which considerably simplifies the angular position-correct mounting of the linear ball bearing. This is followed by the formed as a recess mark 38 on the cover member 30, a radial extension, which is designed to fit into the recess formed as a mark 18 on the projection 11 correspondingly accurate.

Furthermore, the linear ball bearing is designed for a predefinable, at a certain circumferential point substantially perpendicular to the cylinder jacket main load direction, which is also marked on the front side of the linear ball bearing by a marker. The marking is realized by an axially protruding extension 29 on the deflection element 20, which engages in a corresponding recess 39 of the cover element 30. In this case, in particular, the cover element 30 and the deflecting element 20 are formed differently colored, so that the marking is particularly well recognizable. This marking also facilitates the proper installation of the linear ball bearing with respect to the main load direction. The FIGS. 7 and 8 show again in the FIG. 6 denoted by A and B. Section enlargements of the front side in the area of the markings 18 and 38.

The elements 10, 20 and 30 are in particular produced by injection molding from a plastic. In this case, in particular, the deflecting element 20 and the cover element 30 are formed in the axial direction free of undercuts, which makes their injection-molding production particularly simple and thus cost-effective. Elaborate slides on the injection molding tool are therefore not required with advantage. Also, the basic element is designed in this respect with particular advantage such that it is exclusively axially demoldable inside and only radially outwardly must be removed from the mold. This can also be a simple design injection molding tool used, which in turn has a positive effect on the cost position. Particularly noteworthy is that the production with special advantage without a forced removal manages.

The FIG. 9 shows as a further embodiment of the invention in a perspective view a linear ball bearing, which unlike the linear ball bearing of FIGS. 1 to 8 in the circumferential direction is not formed in a hollow cylinder-like closed, but the hollow cylinder is formed in a sector-like peripheral portion with an opening which detects the full wall thickness and the entire longitudinal extent of the linear ball bearing. The linear ball bearing of FIG. 9 is similar to the linear ball bearing FIGS. 1 to 8 composed of the there designated elements 10 ', 20' and 30 '. In this case, the basic element 10 'and the deflecting elements 20' arranged on both axial ends comprise inner-groove-like recesses groove-like depressions 70 'on both sides of said opening, in which a corresponding seal can be used for sealing against the axis.

Furthermore, also in the linear ball bearing of FIG. 9 between the deflecting element 20 'and the cover element 30', a seal 50 'be inserted, extending from the seal 50 according to the FIG. 5 this distinguishes that the seal 50 'does not form a self-contained ring and that also on the outer shell side instead of the annular circumferential bead 54 an obliquely outwardly projecting extension 54' is formed, which is corresponding in the FIGS. 10 to 12 is shown. The FIG. 10 shows a front view, the FIG. 11 a longitudinal section along the line CC of FIG. 10 and the FIG. 12 that in the FIG. 10 D detail of the seal 50 '. In this case, causes said obliquely outwardly oriented extension 54 ', that the seal 50' is pressed radially in the direction corresponding to the axis accordingly, so that a particularly good sealing effect is ensured with particular advantage. Otherwise, that applies to the previous FIGS. 1 to 8 Described for the FIGS. 9 to 11 accordingly, whereby in the FIGS. 9 to 12 the FIGS. 1 to 8 corresponding components with the same reference numerals, supplemented by a hyphen, are designated.

Of course, in other embodiments, the seal design according to the FIGS. 10 to 12 be applied in a circumferentially closed self-contained, hollow cylinder-like linear bearings and vice versa, of course, a corresponding to the FIG. 5 formed seal at a circumferentially not closed in itself formed linear roller bearings are used.

LIST OF REFERENCE NUMBERS

10, 10 '

basic element

11

projection

12

opening

14

guide

16

deepening

18

mark

20.20 '

deflecting

22

radial extension

24

guide

26

axial extension

27

nose

29

extension

30.30 '

cover element

32

radial extension

37

nose

38

mark

39

recess

40, 40 '

lubricant storage

46

extension

50.50 '

poetry

52

rectangular base area

54

bead

54 '

extension

56, 57

sealing lip

60.60 '

Career inlay

70 '

deepening

Claims (15)

Linear rolling bearing, including the following features: A hollow cylinder-like basic element, the linear roller bearing is designed for a predefinable main load direction, which is essentially perpendicular to the hollow cylinder shell, at a first circumferential point, - The base is formed at a second circumferential location for an axial and / or non-rotatable fastening with its installation environment and / or a Nachshmieren, and - The linear roller bearing has at least one of its end faces, a first mark, indicating the first circumferential location, and a second mark, indicating the second circumferential location, on. Linear rolling bearing according to claim 1, comprising the following features: The hollow cylinder-like basic element comprises substantially rectilinear guides for the loaded and unloaded, intended for endless circulation rolling elements, at least one annular deflecting element with at least one deflecting guide between the rectilinear guides, - At least one ring-like cover element and - At at least one axial end of the base member this is formed in the region of the outer shell with such an axial projection, that in the cavity of the projection successively the deflecting element and the cover element can be arranged. Linear rolling bearing according to claim 2, wherein the deflecting element comprises an axial extension, which is intended to be provided for engaging in a corresponding Ausnchmung on the cover element. Linear rolling bearing according to claim 3, wherein the extension and the recess are formed with a triangular cross-section. Linear rolling bearing according to one of claims 2 to 4, wherein at least two of the elements, in particular the deflecting and the cover element, are formed with a different color. Linear rolling bearing according to one of claims 3 to 5, wherein the extension forms the first mark. Linear rolling bearing according to one of claims 1 to 6, wherein the base element and / or the cover element are formed frontally with the second marking. Linear rolling bearing according to one of claims 2 to 7, wherein the projection, the deflecting element and the cover element are designed such that the elements can be snapped into the projection. Linear rolling bearing according to claim 8, wherein the elements are designed such that the elements are einschnappbar only in a predetermined rotational position to each other. Linear rolling bearing according to one of claims 1 to 9, wherein at least one of the element is formed of plastic. Linear rolling bearing according to one of claims 2 to 10, wherein the deflecting element and the Dcckelelement are formed in the axial direction free of undercuts. Linear rolling bearing according to one of claims 1 to 11, wherein at least one of the elements is produced by injection molding. Linear rolling bearing according to one of claims 2 to 12, wherein the rolling elements are formed as balls. Linear rolling bearing according to one of claims 1 to 13, wherein the elements are formed closed in the circumferential direction in itself. Linear rolling bearing according to one of claims 1 to 13, wherein the elements are formed in a matching, sector-like peripheral portion with an opening which detects the full wall thickness and the entire longitudinal extent.

Images